Power Soundstandard CA30 -8Stereo power 1500W*2 -4Stereo power 2250W*2 -2Stereo power 3000W*2 -8Bridge power 4500W -4Bridge power 6000W -Frequency Response 20Hz-20KHz0.3dB -THD+N(20Hz-20KHz) 0.03%@8ohm 1KHz -S/N Ratio 93dB -Damping Factor gt;300 -Input Impedance 20K ohm(Balance)/10K ohm(Unbalance) -Output Circuitry Class h -Input Sensitivity 0.775V/1V/1.4V -Protect Overheat short circuits,DC limit and softstart, Output relay--Zero Current Switch, Intellctual Clip limiter.